ok my car started acting up lately its a boosted 94 gsr turbo, whats happening is at low throttle the engine starts bucking like crazy in any gear if i give it more gas its fine . i cant figure it out. i replaced the fuel filter , cap-rotor, plugs look fine wires are fairly new ive also cleaned the iacv , fast idle valve.

 

Sounds like a vacuum leak.

 

i checked that too